The study will compare the effect of IV infusion and IM oxytocin administration on the proportion of women who experience blood loss greater than or equal t 350 ml, the proportion of women who experience blood loss greater than or equal to 500 ml, side effects, adverse events and change in hemoglobin pre- to post-delivery. It will also assess whether a bleeding history questionnaire can identify women at risk for excessive bleeding and help to define the distribution of bleeding scores among women with and without excessive bleeding.